After #10234 there are some pending specs that should be included to keep the high quality standards of the code.

• tests of the introduced content blocks (maybe unitary tests on the cells is enough):
  • decidim-blogs/app/cells/decidim/blogs/content_blocks/highlighted_posts_cell.rb - done in Add specs for new content blocks #12027
  • decidim-assemblies/app/cells/decidim/assemblies/content_blocks/related_assemblies_cell.rb - done in Add specs for new content blocks #12027
  • decidim-proposals/app/cells/decidim/proposals/highlighted_proposals_for_component_cell.rb - done in Add specs for new content blocks #12027
  • decidim-meetings/app/cells/decidim/meetings/content_blocks/highlighted_meetings_cell.rb
• unitary test on decidim-admin/app/cells/decidim/admin/content_block_cell.rb
• testing a page with all the blocks might not be realistic and will be very slow, so I suggest to create a system test with some blocks to check the integration between cells, content blocks and the rendering of the process page.
• testing the admin workflow of publishing / unpublishing content blocks and check they are being rendered in the front page